Hottest Questions This Week

15

votes

4

answers

3k

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How could the ideal gas law be discovered from experiments on real gases?

physical-chemistry gas-laws

modified Feb 15 at 9:11 matt_black 18.9k

4

votes

1

answer

674

views

I left a bottle of water in the fridge for the past three months. I took it out today. There was a block of ice in it. How?

physical-chemistry water

modified Feb 12 at 0:03 andselisk 16.3k

5

votes

1

answer

267

views

Need some help proving the following statements in Thermodyamics?

thermodynamics

modified Feb 12 at 8:35 Ivan Neretin 23.2k

4

votes

2

answers

249

views

Why doesn't the particle in a ring model have a potential energy term?

physical-chemistry quantum-chemistry

modified 10 hours ago Karsten Theis 1,820

6

votes

1

answer

174

views

Valence bond theory and molecular orbital theory — how do they complement one another?

molecular-orbital-theory valence-bond-theory

modified yesterday Gaurang Tandon 5,251

1

vote

2

answers

125

views

Entropy change of isothermal irreversible expansion of ideal gas

physical-chemistry thermodynamics gas-laws entropy

modified 21 hours ago Try Hard 1,199

3

votes

1

answer

162

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What does x mean in (1-x)A – xB composite materials, molar ratio, weight ratio or volume fraction?

physical-chemistry concentration solid-state-chemistry notation

modified Feb 12 at 17:26 andselisk 16.3k

5

votes

4

answers

95

views

Where does the potential energy of capillary action come from?

water energy surface-chemistry capillary-forces

modified Feb 14 at 15:36 Charlie Crown 201

3

votes

1

answer

196

views

Why BiCl5 isn't stable?

inorganic-chemistry electronic-configuration halides oxidation-state

modified yesterday Mithoron 3,622

7

votes

2

answers

82

views

What library/program can draw molecules in 3D programmatically?

software

modified Feb 13 at 13:27 Karsten Theis 1,820

7

votes

1

answer

71

views

How do the def2-SV, def2-SV(P), and def2-SVP basis sets differ?

computational-chemistry basis-set

modified Feb 13 at 16:12 A.K. 9,045

1

vote

2

answers

66

views

Concept of enthalpy at a given temperature

physical-chemistry thermodynamics theoretical-chemistry

modified Feb 12 at 20:47 andselisk 16.3k

1

vote

1

answer

31

views

Is there a difference between a chelate ligand and a polydentate ligand?

coordination-compounds

answered Feb 13 at 21:00 Zhe 12.4k

4

votes

3

answers

46

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Why sp3 hybridisation in NH3 but bonding with pure p orbitals in case of other hydrides of group 15

inorganic-chemistry hybridization

answered yesterday Andrew 823

2

votes

1

answer

65

views

Finding the color of crystal violet theoretically

quantum-chemistry

modified 16 hours ago PJ R 1,007

3

votes

1

answer

48

views

What is the oxidation state of bromine in BrO3?

inorganic-chemistry halides oxidation-state

modified Feb 12 at 2:52 andselisk 16.3k

1

vote

1

answer

73

views

Determine surface area of heat exchange tube

physical-chemistry thermodynamics heat

modified Feb 14 at 12:36 Chester Miller 6,304

0

votes

2

answers

44

views

Is there a way to search for adducts by exact mass? [on hold]

mass-spectrometry

modified Feb 14 at 19:25 Mathew Mahindaratne 779

2

votes

1

answer

63

views

Why does the beryllium 2+ ion have a larger radius than a helium atom?

atomic-radius

modified 3 hours ago andselisk 16.3k

-1

votes

2

answers

62

views

Molar mass vs molecular mass

mole

modified 1 hour ago Try Hard 1,199

0

votes

1

answer

36

views

Quantitative MO theory- how is the overlap integral and the weighting coefficients of the molecular orbital actually evaluated?

quantum-chemistry molecular-orbital-theory

answered Feb 12 at 18:21 TAR86 4,554

4

votes

1

answer

56

views

C4v point group complexes and the group orbitals (MO Theory)

coordination-compounds molecular-orbital-theory

answered Feb 14 at 12:32 orthocresol♦ 39k

0

votes

1

answer

54

views

Nuclear equations for the decay of radon-222 to lead-206 [on hold]

radioactivity nuclear-chemistry

modified Feb 14 at 0:22 andselisk 16.3k

-1

votes

2

answers

49

views

How can I determine the highest boiling point given a list of molecules? [closed]

intermolecular-forces boiling-point vsepr-theory

modified Feb 12 at 23:24 Mathew Mahindaratne 3,588

1

vote

1

answer

72

views

Work done in an irreversible process

thermodynamics

modified Feb 14 at 18:09 Charlie Crown 201

0

votes

1

answer

33

views

Why this redox equation occurs on basic medium?

inorganic-chemistry redox aqueous-solution

modified yesterday andselisk 16.3k

-2

votes

2

answers

32

views

How to convert but-2-ene to but-1-ene? [on hold]

organic-chemistry hydrocarbons

modified 2 days ago Martin - マーチン♦ 33.4k

0

votes

1

answer

67

views

Can running water carry an electrical current indefinitely, and for long distances?

water electricity

modified Feb 11 at 23:52 cal 6

-1

votes

1

answer

66

views

Why Guanidine is called as strong base

organic-chemistry acid-base

modified 6 hours ago Harsh jain 673

4

votes

1

answer

51

views

Chemical shifts of OH protons

alcohols nmr-spectroscopy

modified yesterday Try Hard 1,199

2

votes

1

answer

30

views

C5v E1 SALC production using Full Projection

molecular-orbital-theory symmetry group-theory

answered Feb 11 at 23:54 user5713492 536

-1

votes

1

answer

62

views

Mechanism of the reaction [closed]

organic-chemistry

modified Feb 11 at 16:35 Advil Sell 137

2

votes

3

answers

47

views

Solubility of solids in liquids

thermodynamics solubility solutions phase

modified 23 hours ago Try Hard 1,199

-2

votes

1

answer

27

views

How do I get a 20% ratio of sodium bisulfate with 1 gallon water? [on hold]

aqueous-solution concentration

answered Feb 14 at 7:52 MaxW 14.7k

1

vote

1

answer

32

views

Molecular Orbital Mixing to get the Molecular Orbitals of a large molecule

quantum-chemistry computational-chemistry molecular-orbital-theory polymers

answered Feb 11 at 15:42 PJ R 1,007

-1

votes

2

answers

52

views

Questions on Neutral oxides

inorganic-chemistry acid-base

answered 2 days ago ANZGC FlyingFalcon 102

1

vote

1

answer

40

views

Quasi-static implies that T aprox equals Tsurr?

thermodynamics

modified 2 days ago Chester Miller 6,304

0

votes

3

answers

51

views

Conversion from a PPB value to µg/m3 of Isobutylene

concentration notation units

modified yesterday andselisk 16.3k

1

vote

1

answer

24

views

Gabriel Phthalamide Reaction

organic-chemistry amines amides

answered 13 hours ago Waylander 6,376

0

votes

2

answers

39

views

Determining the formula of zirconium oxide

inorganic-chemistry stoichiometry

modified Feb 13 at 5:52 ceno980 19

0

votes

1

answer

38

views

MO diagram for pentaamminechlorocobalt(III)?

molecular-orbital-theory

answered 2 days ago Andrew 823

5

votes

0

answers

46

views

How to evaluate the expectation value of the Hamiltonian for a three electron Slater determinant?

quantum-chemistry orbitals theoretical-chemistry ab-initio

modified yesterday Tyberius 6,880

3

votes

1

answer

34

views

Equation for overall heat transfer coefficient

thermodynamics heat chemical-engineering thermal-conductivity

modified Feb 12 at 20:54 Try Hard 1,199

1

vote

0

answers

56

views

Alkoxide as a leaving group in hydrolysis of ester

organic-chemistry hydrolysis

modified Feb 12 at 16:05 andselisk 16.3k

2

votes

3

answers

56

views

Markovnikov Rule of Alkenes

reaction-mechanism c-c-addition

answered Feb 13 at 15:12 thewitness 424

5

votes

0

answers

43

views

Ab initio MD simulations in VASP

computational-chemistry software density-functional-theory

modified Feb 13 at 15:58 user34801 253

0

votes

1

answer

54

views

Solubility of dimethyl ether in aliphatic hydrocarbons

solubility

answered Feb 14 at 1:35 Mathew Mahindaratne 779

2

votes

1

answer

42

views

Rate of hydrolysis of silicon tetrahalides

inorganic-chemistry hydrolysis

answered Feb 11 at 16:44 Soumik Das 3,855

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